#!/usr/bin/env node

const log = console.log,
      Dog = require('./02-dog');

let taidi = new Dog('taidi',4),
    zangao = new Dog('zangao',8);


taidi.on('bark',onBark);
zangao.on('bark',onBark);

function onBark(){
  log(`${this.name()} barked! energy:${this.energy()}`);
}
    




